In article ,
"Morgans" wrote:

"Alan Baker" wrote

Right. But trying to take moments about a centre of drag that is
changing because of the very thing causing you to take the moments in
the first place is a recipe for madness.

Just take them about the centre of mass!

It matters not what you take the moments from, as long as it is from a
stationary reference on the plane.

That much at least is true.

--
Alan Baker
Vancouver, British Columbia
http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg